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Problem with TIMER ON DELAY

Discussion in 'C' started by boschow, Jun 11, 2007.

  1. boschow

    boschow New Member

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    Hi all,
    i am programing a microprocessor. The system part of the application is already done, so i have to write the logic for all the inputs and the outputs ...

    In the system part of the the application there si a function UINT32 CSS_GetTime (UINT16 *ms) that gets the time in seconds and miliseconds since last reboot.

    ms - is the pointer that holds the number of miliseconds (0 ..999). Can be NULL if miliseconds are not needed.

    So i wrote the code something like this:
    Code:
    
    UINT32 get_time;
    UINT32 delay_time = 3;
    
    if input1 {
           get_time = CSS_GetTime(NULL);
           if get_time > delay_time {
                            output1 = 1;
         } else output1 = 0;
    }
    
    This part of the program only works after the reset, because the get_time is never set to zero. Any ideas how can i do this?

    I also tryed with miliseconds. Code:
    Code:
    UINT16 get_mili_sec=0;
    UINT32 get_time;
    UINT32 time_increment;
    UINT32 delay_time = 3;
    UINT32 curr_time;
    
    if input1 {
           get_time = CSS_GetTime (&get_mili_sec);
              if (get_time == 999) {
                       time_increment = 1;
              } else time_increment = 0;
              curr_time += time_increment;
              if (curr_time > delay_time) {
                     output = 1;
                     curr_time = 0;
              } else output = 0;
                        curr_time = 0;
    }
    
    This part of the program also dosent work. Can somebody tell me what am i doing wrong?

    Thx for your time and help,
    Best regards,
    BoSCHoW.
     
  2. boschow

    boschow New Member

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    The timer, is working now. But once the output is set i cannot put it to 0 even if the input is pressed for a shorter time then 3000 ms. I dont know what i did wrong, can somebody help me. Below is the code that i used ...
    Code:
    if (contactor == 1) output1=1;
    else output1=0;
    
    // RS FLIP FLOP SETS FINAL OUTPUT
     (!key_not_pressed 
        && (time_key_active== 0))      contactor = 0;
    else if (!key_not_pressed 
             && (time_key_active == 1)) contactor = 1;
    else if (key_not_pressed 
             && (time_key_active == 0)) contactor = 0;
    else if (key_not_pressed 
             && (time_key_active == 1)) contactor = 0;
    
    //     LOGIC AND - chaks the status of the key
    if ((key_check_status ==0)    // check key status failed 
         && input1) // key pressed
    		key_not_pressed = 0;
    else if ((key_check_status ==0)  // check key status failed
         && !input1) // key not pressed
    		key_not_pressed  = 0;
    else if ((key_check_status ==1) // check key status success
         && !input1)  // key not presset 
                    key_not_pressed  = 1;
    else if ((preverjanje_stanja_tipke==1)	// check key stats success
         &&  input1) // key pressed
                    key_not_pressed  = 0;
    
    // FLIP FLOP - CHECK KEY STATUS
    if (input1  // key pressed
        && (time_key_active == 0))	// key not active
    		preverjanje_stanja_tipke = 1;
    else if (input1 // key pressed
        && (time_key_active == 1)) // key active
        key_check_status = 0;
    else if (!input1 // key not pressed 
        && (time_key_active == 0)) // key not active
        key_check_status = 0;
    else if (!input1 // key not pressed 
        && (time_key_active== 1)) // key active
        key_check_status = 0;
    
     //		 TIMER STARTER
    if (input1) {
        begin_s = CSS_GetTime(&begin_ms);
          do {
            time_key_active= 0;
            now_ms = 0;
            now_s = CSS_GetTime(&now_ms);
            passed_time = (now_s - begin_s) * 1000 + (now_ms - begin_ms);
          
          }
          while (passed_time < 3000);
          time_key_active= 1;
    }
    
    Thanks for your time and help,
    best regards,
    BoSCHoW.
     

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